Capítols de llibre
http://hdl.handle.net/2117/3922
2018-03-18T15:53:07ZPerturbation of matrices preserving the Segre characteristics of the non-nilpotent Jordan blocks
http://hdl.handle.net/2117/114874
Perturbation of matrices preserving the Segre characteristics of the non-nilpotent Jordan blocks
Magret Planas, Maria dels Dolors
Abstract
We consider in the space of square matrices with complex co-
efficients the following equivalence relation: two matrices are
said to be equivalent if and only if the direct sum of the non-
nilpotent Jordan blocks in their canonical Jordan form are the
same (up to permutation of the blocks), and allowing the nilpo-
tent Jordan blocks to be different. This condition is equivalent
to having the same Drazin inverses. We study the structure of
the sets consisting of matrices which satisfy this condition (that
is to say, equivalence classes).
If we consider the sets of matrices which have the same Segre
characteristics for the non-zero eigenvalues, allowing their val-
ues to be different, we obtain a stratification. We also investi-
gate the effect of small perturbations, constructing closure hi-
erarchies and identifying more generic and more degenerated
nearby matrices to a given one.
2018-03-07T08:01:49ZMagret Planas, Maria dels DolorsAbstract
We consider in the space of square matrices with complex co-
efficients the following equivalence relation: two matrices are
said to be equivalent if and only if the direct sum of the non-
nilpotent Jordan blocks in their canonical Jordan form are the
same (up to permutation of the blocks), and allowing the nilpo-
tent Jordan blocks to be different. This condition is equivalent
to having the same Drazin inverses. We study the structure of
the sets consisting of matrices which satisfy this condition (that
is to say, equivalence classes).
If we consider the sets of matrices which have the same Segre
characteristics for the non-zero eigenvalues, allowing their val-
ues to be different, we obtain a stratification. We also investi-
gate the effect of small perturbations, constructing closure hi-
erarchies and identifying more generic and more degenerated
nearby matrices to a given one.Patrimonio de la ETSEIB. Aparatos telefónicos de 1878
http://hdl.handle.net/2117/114872
Patrimonio de la ETSEIB. Aparatos telefónicos de 1878
Roca Rosell, Antoni Maria Claret; Sánchez Miñana, Jesús; Lusa Monforte, Guillermo
2018-03-07T07:35:01ZRoca Rosell, Antoni Maria ClaretSánchez Miñana, JesúsLusa Monforte, GuillermoSensor data validation and reconstruction
http://hdl.handle.net/2117/113525
Sensor data validation and reconstruction
Quevedo Casín, Joseba Jokin; García Valverde, Diego; Puig Cayuela, Vicenç; Saludes Closa, Jordi; Cugueró, Miquel Àngel; Espin Basany, Santiago; Roquet, Jaume; Valero Cervera, Fernando
This book presents a set of approaches for the real-time monitoring and control of drinking-water networks based on advanced information and communication technologies. It shows the reader how to achieve significant improvements in efficiency in terms of water use, energy consumption, water loss minimization, and water quality guarantees.
The methods and approaches presented are illustrated and have been applied using real-life pilot demonstrations based on the drinking-water network in Barcelona, Spain. The proposed approaches and tools cover:
- decision-making support for real-time optimal control of water transport networks, explaining how stochastic model predictive control algorithms that take explicit account of uncertainties associated with energy prices and real demand allow the main flow andpressure actuators—pumping stations and pressure regulation valves—and intermediate storage tanks to be operated to meet demand using the most sustainable types of source and with minimum electricity costs;
- decision-making support for monitoring water balance and distribution network quality in real time, implementing fault detection anddiagnosis techniques and using information from hundreds of flow,pressure, and water-quality sensors together with hydraulic and quality-parameter-evolution models to detect and locate leaks in the network, possible breaches in water quality, and failures in sensors and/or actuators;
- consumer-demand prediction, based on smart metering techniques, producing detailed analyses and forecasts of consumption patterns,providing a customer communications service, and suggesting economic measures intended to promote more efficient use of water at the household level.
Researchers and engineers working with drinking-water networks will find this a vital support in overcoming the problems associated with increased population, environmental sensitivities and regulation, aging infrastructures, energy requirements, and limited water sources.
2018-02-01T09:54:25ZQuevedo Casín, Joseba JokinGarcía Valverde, DiegoPuig Cayuela, VicençSaludes Closa, JordiCugueró, Miquel ÀngelEspin Basany, SantiagoRoquet, JaumeValero Cervera, FernandoThis book presents a set of approaches for the real-time monitoring and control of drinking-water networks based on advanced information and communication technologies. It shows the reader how to achieve significant improvements in efficiency in terms of water use, energy consumption, water loss minimization, and water quality guarantees.
The methods and approaches presented are illustrated and have been applied using real-life pilot demonstrations based on the drinking-water network in Barcelona, Spain. The proposed approaches and tools cover:
- decision-making support for real-time optimal control of water transport networks, explaining how stochastic model predictive control algorithms that take explicit account of uncertainties associated with energy prices and real demand allow the main flow andpressure actuators—pumping stations and pressure regulation valves—and intermediate storage tanks to be operated to meet demand using the most sustainable types of source and with minimum electricity costs;
- decision-making support for monitoring water balance and distribution network quality in real time, implementing fault detection anddiagnosis techniques and using information from hundreds of flow,pressure, and water-quality sensors together with hydraulic and quality-parameter-evolution models to detect and locate leaks in the network, possible breaches in water quality, and failures in sensors and/or actuators;
- consumer-demand prediction, based on smart metering techniques, producing detailed analyses and forecasts of consumption patterns,providing a customer communications service, and suggesting economic measures intended to promote more efficient use of water at the household level.
Researchers and engineers working with drinking-water networks will find this a vital support in overcoming the problems associated with increased population, environmental sensitivities and regulation, aging infrastructures, energy requirements, and limited water sources.Raoul Dufy i la Fée Électricité (1937). Elogi de l’electrificació en un món convuls
http://hdl.handle.net/2117/113518
Raoul Dufy i la Fée Électricité (1937). Elogi de l’electrificació en un món convuls
Roca Rosell, Antoni Maria Claret
2018-02-01T08:53:32ZRoca Rosell, Antoni Maria ClaretDemand forecasting for real-time operational control
http://hdl.handle.net/2117/113517
Demand forecasting for real-time operational control
Saludes Closa, Jordi; Quevedo Casín, Joseba Jokin; Puig Cayuela, Vicenç
This book presents a set of approaches for the real-time monitoring and control of drinking-water networks based on advanced information and communication technologies. It shows the reader how to achieve significant improvements in efficiency in terms of water use, energy consumption, water loss minimization, and water quality guarantees.
The methods and approaches presented are illustrated and have been applied using real-life pilot demonstrations based on the drinking-water network in Barcelona, Spain. The proposed approaches and tools cover:
- decision-making support for real-time optimal control of water transport networks, explaining how stochastic model predictive control algorithms that take explicit account of uncertainties associated with energy prices and real demand allow the main flow andpressure actuators—pumping stations and pressure regulation valves—and intermediate storage tanks to be operated to meet demand using the most sustainable types of source and with minimum electricity costs;
- decision-making support for monitoring water balance and distribution network quality in real time, implementing fault detection anddiagnosis techniques and using information from hundreds of flow,pressure, and water-quality sensors together with hydraulic and quality-parameter-evolution models to detect and locate leaks in the network, possible breaches in water quality, and failures in sensors and/or actuators;
- consumer-demand prediction, based on smart metering techniques, producing detailed analyses and forecasts of consumption patterns,providing a customer communications service, and suggesting economic measures intended to promote more efficient use of water at the household level.
Researchers and engineers working with drinking-water networks will find this a vital support in overcoming the problems associated with increased population, environmental sensitivities and regulation, aging infrastructures, energy requirements, and limited water sources.
2018-02-01T08:52:45ZSaludes Closa, JordiQuevedo Casín, Joseba JokinPuig Cayuela, VicençThis book presents a set of approaches for the real-time monitoring and control of drinking-water networks based on advanced information and communication technologies. It shows the reader how to achieve significant improvements in efficiency in terms of water use, energy consumption, water loss minimization, and water quality guarantees.
The methods and approaches presented are illustrated and have been applied using real-life pilot demonstrations based on the drinking-water network in Barcelona, Spain. The proposed approaches and tools cover:
- decision-making support for real-time optimal control of water transport networks, explaining how stochastic model predictive control algorithms that take explicit account of uncertainties associated with energy prices and real demand allow the main flow andpressure actuators—pumping stations and pressure regulation valves—and intermediate storage tanks to be operated to meet demand using the most sustainable types of source and with minimum electricity costs;
- decision-making support for monitoring water balance and distribution network quality in real time, implementing fault detection anddiagnosis techniques and using information from hundreds of flow,pressure, and water-quality sensors together with hydraulic and quality-parameter-evolution models to detect and locate leaks in the network, possible breaches in water quality, and failures in sensors and/or actuators;
- consumer-demand prediction, based on smart metering techniques, producing detailed analyses and forecasts of consumption patterns,providing a customer communications service, and suggesting economic measures intended to promote more efficient use of water at the household level.
Researchers and engineers working with drinking-water networks will find this a vital support in overcoming the problems associated with increased population, environmental sensitivities and regulation, aging infrastructures, energy requirements, and limited water sources.L’Almanac perpetu de Tortosa (1307) i els orígens de la historiografia catalana de la ciència
http://hdl.handle.net/2117/113464
L’Almanac perpetu de Tortosa (1307) i els orígens de la historiografia catalana de la ciència
Roca Rosell, Antoni Maria Claret
2018-01-31T13:10:59ZRoca Rosell, Antoni Maria ClaretUna obra ‘matemàtica’ singular. Pasqual Calbó, un artista-científic
http://hdl.handle.net/2117/113460
Una obra ‘matemàtica’ singular. Pasqual Calbó, un artista-científic
Roca Rosell, Antoni Maria Claret
2018-01-31T13:02:42ZRoca Rosell, Antoni Maria ClaretPreorders in simple games
http://hdl.handle.net/2117/113429
Preorders in simple games
Freixas Bosch, Josep; Pons Vallès, Montserrat
Any power index defines a total preorder in a simple game and, thus, induces a hierarchy among its players. The desirability relation, which is also a preorder, induces the same hierarchy as the Banzhaf and the Shapley indices on linear games, i.e., games in which the desirability relation is total. The desirability relation is a sub–preorder of another preorder, the weak desirability relation, and the class of weakly linear games, i.e., games for which the weak desirability relation is total, is larger than the class of linear games. The weak desirability relation induces the same hierarchy as the Banzhaf and the Shapley indices on weakly linear games. In this paper, we define a chain of preorders between the desirability and the weak desirability preorders. From them we obtain new classes of totally preordered games between linear and weakly linear games.
This is a post-peer-review, pre-copyedit version of an article published in Lecture Notes in Computer Science. The final authenticated version is available online at: https://doi.org/10.1007/978-3-319-70647-4_5.
2018-01-31T10:31:34ZFreixas Bosch, JosepPons Vallès, MontserratAny power index defines a total preorder in a simple game and, thus, induces a hierarchy among its players. The desirability relation, which is also a preorder, induces the same hierarchy as the Banzhaf and the Shapley indices on linear games, i.e., games in which the desirability relation is total. The desirability relation is a sub–preorder of another preorder, the weak desirability relation, and the class of weakly linear games, i.e., games for which the weak desirability relation is total, is larger than the class of linear games. The weak desirability relation induces the same hierarchy as the Banzhaf and the Shapley indices on weakly linear games. In this paper, we define a chain of preorders between the desirability and the weak desirability preorders. From them we obtain new classes of totally preordered games between linear and weakly linear games.Damage and fault detection of structures using principal component analysis and hypothesis testing
http://hdl.handle.net/2117/112966
Damage and fault detection of structures using principal component analysis and hypothesis testing
Pozo Montero, Francesc; Vidal Seguí, Yolanda
This chapter illustrates the application of principal component analysis (PCA) plus statistical hypothesis testing to online damage detection in structures, and to fault detection of an advanced wind turbine benchmark under actuators (pitch and torque) and sensors (pitch angle measurement) faults. A baseline pattern or PCA model is created with the healthy state of the structure using data from sensors. Subsequently, when the structure is inspected or supervised, new measurements are obtained and projected into the baseline PCA model. When both sets of data are compared, both univariate and multivariate statistical hypothesis testing is used to make a decision. In this work, both experimental results (with a small aluminum plate) and numerical simulations (with a well-known benchmark wind turbine) show that the proposed technique is a valuable tool to detect structural changes or faults.
2018-01-19T10:34:57ZPozo Montero, FrancescVidal Seguí, YolandaThis chapter illustrates the application of principal component analysis (PCA) plus statistical hypothesis testing to online damage detection in structures, and to fault detection of an advanced wind turbine benchmark under actuators (pitch and torque) and sensors (pitch angle measurement) faults. A baseline pattern or PCA model is created with the healthy state of the structure using data from sensors. Subsequently, when the structure is inspected or supervised, new measurements are obtained and projected into the baseline PCA model. When both sets of data are compared, both univariate and multivariate statistical hypothesis testing is used to make a decision. In this work, both experimental results (with a small aluminum plate) and numerical simulations (with a well-known benchmark wind turbine) show that the proposed technique is a valuable tool to detect structural changes or faults.How are groceries, images, and matrices related?
http://hdl.handle.net/2117/112518
How are groceries, images, and matrices related?
Gómez Urgellés, Joan Vicenç
Mathematical Modeling: Methods, Applications and Research reviews recent progress in three different propulsion systems which may offer significant advantages for more efficient, compact and adaptive astronautic vehicles in the mid-21st century: swirling nuclear magneto-hydrodynamic propulsion, biomimetic magneto-rheological propulsion and electro-hydrodynamic propulsion systems. The authors introduce an empirical mathematical model. This model has been developed to describe contrast uptake and washout behavior without use of vascular input functions. Though this approach does not require making assumptions about underlying physiology or anatomy, the primary disadvantage of this approach, is that the parameters obtained by this approach do not correspond directly to identifiable physiological or anatomic features. In closing, the authors aim to express how the mathematical modeling is a valid tool for teaching and learning in a competent way and should be incorporated in academic curricula
2018-01-09T15:00:54ZGómez Urgellés, Joan VicençMathematical Modeling: Methods, Applications and Research reviews recent progress in three different propulsion systems which may offer significant advantages for more efficient, compact and adaptive astronautic vehicles in the mid-21st century: swirling nuclear magneto-hydrodynamic propulsion, biomimetic magneto-rheological propulsion and electro-hydrodynamic propulsion systems. The authors introduce an empirical mathematical model. This model has been developed to describe contrast uptake and washout behavior without use of vascular input functions. Though this approach does not require making assumptions about underlying physiology or anatomy, the primary disadvantage of this approach, is that the parameters obtained by this approach do not correspond directly to identifiable physiological or anatomic features. In closing, the authors aim to express how the mathematical modeling is a valid tool for teaching and learning in a competent way and should be incorporated in academic curricula